Live testing of remote categories

[julian@community.nodebb.org]

The remaining questions here are:

• whether preferredUsername is meant to be unique to the instance (in which case having multiple ids point to an identical preferredUsername would be a violation), and
• what exactly AP software should do when it encounters this situation... store a list of "known alias" IDs? There are potential security issues to doing so.

[julian@community.nodebb.org]

@AltCode all three flipboard remote categories seem to be working now